Frequency converter
ER12

The most important advantages:
  • very compact
  • Configurable without power
  • Plug and Drive

ER12 – Basic frequency inverter

ER12 - Basic frequency inverter

– a vector-controlled device series from 0.18 to 4.0 kW.

BASE-LINE

Frequency inverter for speed adjustment of DS asynchronous motors, 0.18 to 4.0 kW, 200 to 240 V, 1~, 3~, 200 to 240 V, 1~, 3~

The ER12 continues the success story of the ER11 frequency inverters: improved performance, expanded functions, and maximum reliability—tailored to the requirements of modern applications. With the preinstalled factory software, the ER12 is ready to go in 95% of all cases.

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The advantages

Frequency inverter ER12

  • Very compact dimensions
  • Motor control both via the classic V/f characteristic curve and via sensorless vector control or pump/fan characteristic curve
  • Voltage-free configurable, even in the packaging
  • "Plug and Drive" - a standard application runs without settings

Areas of application

Pumpen- & Lüfteranlagen
Pumps & Fans
Fördertechnik
Conveyor technology
Maschinen- und Anlagenbau
mechanical and plant engineering

product information

The ER12 with IP20 protection is available in two housing versions: ER12-…K with heat sink and ER12-…B with base plate and reduced height. The addition U indicates the US version with a mains voltage of 1~ 100…120 V.

  • 4-digit 7-segment display
  • 4 pre-programmed application macros
  • Lacquered boards
  • Low leakage current up to 0.75 kW < 3.5 mA
  • Output frequency 0…400 Hz
  • Navigation wheel for programming and
    as setpoint potentiometer
  • Local control with buttons
  • Analog output
  • built-in PID controller
  • Modbus via RJ 45, RS 485
  • Integrated EMC filter (type K and B),
    Class C1
  • RoHs, WEEE compliant
  • Fieldbuses: Modbus integrated
  • CE, UL, CSA, NOM, C-Tick, GOST

To open up new applications, numerous functions have been expanded and completely new ones created in ER12.

A navigation wheel has been newly installed, which can also be used as a setpoint potentiometer. Also a local control with buttons and an analog output.

The devices have low leakage current up to 0.75 kW < 3.5 mA.
The output frequency has been increased to 400 Hz and the devices can be operated up to 50°C without derating.

Painted circuit boards and Modbus are standard. The power levels 3.0 and 4.0 kW have been added.

The frequency inverters of the ER12 series ( type K and B) have a mains filter class C1 integrated in the device, are CE marked according to the EU Low Voltage and EMC Directive and comply with the applicable product standard for frequency inverters EN 61800-3.

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Frequenzumrichter ER21

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Frequently asked questions

to the ER12 frequency converter

  1. To achieve electromagnetic compatibility, the inverter must be operated with a built-in or external RFI filter.

  2. When using shielded cables between the inverter and the motor, the shield must be connected to earth at both ends. Cable interruptions should be avoided as far as possible. If it is necessary to separate the cable, e.g. in order to install a motor contactor, then the cable shielding must be connected through as directly as possible. It is important to ensure that the lowest possible HF impedance is achieved.

  3. The shorter the cable, the lower the radio interference and leakage current. The maximum possible cable lengths must be taken into account.

  4. To avoid interference with the control inputs, control cables should always be shielded. The shield must be connected to the cable clamp provided on the inverter. If the shield is also connected to a control unit, ensure that the ground points are at the same potential.

  5. Control cables should not cross power cables if possible. Where this cannot be avoided, a right-angle intersection is recommended.

  6. Separate routing of control and power cables should be aimed for. If the cables have to be laid in parallel, e.g. on the same cable route, the greatest possible distance (> 20 cm) should be chosen.

  7. The shielding of the installed cables should have a low RF impedance if possible. Therefore, copper braiding is preferable to steel braiding.

  8. The HF contact resistance at the connection points between the shielding and the housing must be kept as low as possible. Dirt, paint and insulation residues on the housing and shielding in the area of the connections must therefore be removed. In principle, the cable clamps or crimp connections provided for this purpose should be used to connect the shielding. The use of earthing glands is advantageous.

  9. The shielding should be applied to the housing as close as possible to the cable terminals. Longer, free cable ends act as antennas.

  10. For unshielded cables, the cable cores should be twisted and output filters should be used.

Downloads ER12

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